SASkievua;
I don't know about SLI (are you having a problem with it enabled?) or mouse sensitivity, but would think at least the menu problem is on the to-do list.
Arch Seraph;
Some people are having trouble with the gold dragon skin either not showing up, or being in a new game but not after continuing or loading a save.
Do you have the Imperial Edition installed? With the German retail pre-order version from Amazon, they apparently didn't automatically send out the codes, and you have to contact them to get one.